Title: Radar system comprising a primary radar device and a secondary radar device

Abstract: A radar arrangement utilizes a rotating or pivotal antenna lobe and a primary radar device operating with a doppler evaluation system and a secondary radar device equipped with a rotating or pivotal antenna lobe wherein a certain time period (processing time) expires between the scanning of a recognized target by the lobe of the primary radar antenna and the recognition of this target during the target evaluation in the receiver of the primary radar device. A storage device is provided which captures the azimuth angle position of a target recognized by the primary radar receiver and interrogation signals of the secondary radar transmitter are triggered with the help of a control means associated with the storage device for a certain interrogation range only when the antenna lobe of the secondary radar device repeatedly approaches the target. The interrogation range is selected sufficiently large that a number of answer signals is triggered which suffices for the desired reply probability.

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Inventors: Leypold, Dieter (Munich, DT)
Maier, Bruno (Munich, DT)

Application Number: 517221
Filing Date: 1974-10-23
Publication_date: 1976-05-11
Assignee: Siemens Aktiengesellschaft (Berlin & Munich, DT)
Primary Class(es): 342/43 342/45, 342/67
Other Classes:
US Patent Ref:

3328797	Jun, 1967	Jorna et al.	343/6.
3343160	Sep, 1967	Beals et al.	343/6.

Other Refs:
Primary Examiner: Tubbesing, T. H.
Assistant Examiner:
Attorney: Hill, Gross, Simpson, Van Santen, Steadman, Chiara & Simpson